This is a great "mix it up with whatever you've got" recipe. I like lemon the best but it would work with orange as well (or orange cranberry), lime, or I guess even grapefruit (the whole citrus family). The carbs are relatively low too (if you aren't concerned, by all means, use sugar)! The batter seems like a stiff cookie dough before you mix in the egg whites, so don't let that throw you off. It works out and it's delicious!